Kracht Gear Pump Product Catalog
Overview
Kracht GmbH, a leading German manufacturer of fluid technology established in 1911, specializes in high-precision gear pumps for industrial, hydraulic, process, and marine applications. Its product range covers low-pressure transfer pumps (KF Series), high-pressure gear pumps (KP Series), process/dosing pumps (DT/KD Series), and low-speed pumps (BT Series). All Kracht gear pumps feature robust construction, high efficiency, low pulsation, and exceptional durability, suitable for media from low to high viscosity, lubricating to non-lubricating fluids.
1. Low-Pressure Transfer Pumps (KF Series)
The KF series is Kracht’s standard external gear pump with modular design, ideal for general fluid transfer, lubrication, and low-pressure hydraulic systems. It offers the widest displacement range and extensive configuration options.
1.1 Series & Key Specifications
|
Model
|
Displacement Range
|
Max Operating Pressure
|
Max Speed
|
Temperature Range
|
Key Features
|
|---|---|---|---|---|---|
|
KF 0/0.8~KF 0/5
|
0.8~5 cm³/rev
|
25 bar
|
3600 rpm
|
-40~200°C
|
Miniature size, precise dosing
|
|
KF 2.5~630
|
2.5~630 cm³/rev
|
25 bar
|
3600 rpm
|
-40~200°C
|
Standard modular design, multiple valve options
|
|
KF 730~3150
|
730~3150 cm³/rev
|
25 bar
|
2000 rpm
|
-40~200°C
|
Large flow, heavy-duty cast iron housing
|
|
KF 1 coated
|
4.6~24.8 cm³/rev
|
60 bar
|
1500 rpm
|
-10~200°C
|
Wear-resistant coating, for abrasive fluids
|
|
KF magnetic drive
|
2.5~200 cm³/rev
|
25 bar
|
3600 rpm
|
-40~150°C
|
Leak-free magnetic coupling, for toxic/corrosive media
|
1.2 Technical Features
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Design: External gear principle, precision-ground gears, axial/radial compensation for high efficiency.
-
Materials: Grey cast iron (standard), spheroidal cast iron, stainless steel (optional); hardened steel gears.
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Valve Options: Integrated D-valve (pressure relief), T-valve (throttle), U-valve (universal, bi-directional).
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Seals: NBR (-2090°C), FKM/Viton (-15150°C), mechanical seals (up to 200°C).
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Mounting: ISO, SAE flanges; horizontal/vertical positions; ATEX explosion-proof versions.
2. High-Pressure Gear Pumps (KP Series)
KP series are high-pressure external gear pumps for heavy-duty hydraulic and high-pressure fluid systems, with exceptional load capacity.
2.1 Series & Key Specifications
|
Model
|
Displacement Range
|
Max Pressure
|
Max Speed
|
Temperature Range
|
Key Features
|
|---|---|---|---|---|---|
|
KP 1
|
3~28 cm³/rev
|
250~300 bar
|
3600 rpm
|
-20~150°C
|
Compact high-pressure design
|
|
KP 2
|
20~50 cm³/rev
|
300 bar
|
3000 rpm
|
-20~150°C
|
Standard high-pressure, low noise
|
|
KP 3
|
82~125 cm³/rev
|
300 bar
|
2800 rpm
|
-20~150°C
|
Large displacement, high dynamic load
|
|
KP DuroTec
|
10~100 cm³/rev
|
315 bar
|
3000 rpm
|
-20~150°C
|
Enhanced wear resistance, for poor lubrication fluids
|
2.2 Technical Features
-
Structure: Grey cast iron housing, PTFE-Pb coated bearings, case-hardened ground gears (14 teeth for low pulsation).
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Performance: Continuous high-pressure operation, resistance to pressure peaks and vibrations.
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Connections: SAE standard ports, robust flange mounting.
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Bearings: Large-size steel-backed bronze bearings for high radial loads.
3. Process & Dosing Pumps (DT/KD Series)
Designed for precise dosing and process engineering, handling abrasive, corrosive, and high-viscosity media.
3.1 Series & Key Specifications
|
Model
|
Displacement Range
|
Max Pressure
|
Max Speed
|
Temperature Range
|
Applications
|
|---|---|---|---|---|---|
|
DT (DuroTec)
|
3~250 cm³/rev
|
150 bar
|
1500 rpm
|
-20~150°C
|
Abrasive/poor lubrication fluids (polymers, resins)
|
|
KD (Metering)
|
0.1~20 cm³/rev
|
100 bar
|
2000 rpm
|
-20~200°C
|
High-precision chemical dosing
|
|
KF 1 coated
|
4.6~24.8 cm³/rev
|
60 bar
|
1500 rpm
|
-10~200°C
|
Process fluid transfer
|
3.2 Technical Features
-
DT Series: Special coated gears, corrosion-resistant housing, low shear for sensitive media.
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KD Series: Ultra-precise displacement, minimal flow pulsation, reproducible dosing.
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Materials: Stainless steel, coated cast iron, high-grade alloy steels.
-
Seals: Magnetic coupling, mechanical seals for zero leakage.
4. Low-Speed Gear Pumps (BT/BTH Series)
Low-speed, high-torque pumps for medium-high viscosity liquids (oil, grease, adhesives).
4.1 Series & Key Specifications
|
Model
|
Displacement Range
|
Max Pressure
|
Max Speed
|
Temperature Range
|
Key Features
|
|---|---|---|---|---|---|
|
BT
|
6.9~1056 cm³/rev
|
8 bar
|
400 rpm
|
-10~220°C
|
Standard low-speed transfer
|
|
BTH
|
6.9~1056 cm³/rev
|
8 bar
|
400 rpm
|
-10~220°C
|
Heat-resistant version
|
4.2 Technical Features
-
Design: Low-speed, high-volume; suitable for viscous media without shear damage.
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Construction: Cast iron housing, large bearings, robust shaft seals.
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Media: Viscosities up to 100,000 mm²/s; no solid particles.
5. Marine & Special Application Pumps
Kracht offers marine-certified pumps for shipboard lubrication, fuel, and hydraulic systems.
Key Features
-
Certifications: Marine type approvals (LR, DNV, GL).
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Design: Noise-optimized, outboard bearings for gearbox mounting, low-temperature versions (-50°C).
-
Valves: Integrated pressure relief, universal valves for bi-directional flow.
6. Configuration Options
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Housing Materials: Grey cast iron, spheroidal cast iron, stainless steel (1.4408).
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Shaft Types: Standard keyed, splined, tapered, magnetic drive.
-
Connections: SAE, BSP, NPT threads; flange ports.
-
Seal Materials: NBR, FKM (Viton), EPDM, PTFE, mechanical seals.
-
Special Versions: ATEX, high-temperature, low-temperature, corrosion-resistant, filtered.
7. Ordering Example (KF Series)
KF 180 RG1
-
KF: Series
-
180: Displacement (180 cm³/rev)
-
R: Rotation (clockwise)
-
G1: Standard flange/shaft
For custom configurations or technical support, contact Kracht global sales network.
